Mig, printing isn't the only time you need to worry about copyediting. If I were Aaron, I'd want my online material copyedited. I'd want to present as polished and consistent product as I could to my customers. I'd also ask the copyeditor for feedback, so that I could make my blog posts (where I would find potential customers) as professional as possible. Kudos Aaron for caring about this and having it done.

I'd back up Keri on that one even though I am the Lord of lousy grammar and run-on sentences. It would be worthwhile to find yourself a low-wage person w/ plenty of time (college english major, perhaps?) who could proof some of the current and old stuff.

I don't care much about grammar, and there are plenty of folks making 6 figures+ online who still can't figure out which version of their, they're, or there to use, but I bet hiring a college kid to proof old posts would reap you a positive ROI through some kind of deal you wouldn't have gotten before. Just a hunch... :)

I wrote a piece a little while ago about how a copy editor would handle Shakespeare. I hope it was funny, but you probably need some experience with copy editing to think so. I won't stick a link in your blog, but a search for "copyediting Shakespeare" sould probably find it.

Here are a couple of examples to show where grammar and punctuation can make a difference. Think of grammar as math -- all of the numbers can be correct, but if you use the wrong punctuation (decimal place, addition instead of subtraction, etc.) then the meaning of the equation is vastly changed.

2) An oft-cited "Dear John" letter. The words are exactly the same, but placement of the punctuation changes the meaning entirely.

Dear John:

I want a man who knows what love is all about. You are generous, kind, thoughtful. People who are not like you admit to being useless and inferior. You have ruined me for other men. I yearn for you. I have no feelings whatsoever when we're apart. I can be forever happy -- will you let me be yours?
Gloria

Dear John:

I want a man who knows what love is. All about you are generous, kind, thoughtful people, who are not like you. Admit to being useless and inferior. You have ruined me. For other men, I yearn. For you, I have no feelings whatsoever. When we're apart, I can be happy forever. Will you let me be?

Aloha, Aaron. This is trippy...I was one of the early purchasers of your SEO Book and returned it, partly because of the grammar. I provided (what I intended as) some constructive criticism that you pop over to Elance and hire an editor--since I thought the content was pretty good (great now), but you weren't very happy with my feedback. :-) So, just had to say "way to go" for taking your work up another level. Signed, "The Original Grammar Nazi." Best, Kirk Out.